Lithium Hydroxide → HCID 22876406, compound

Participants

Reaction Steps

1.3 g (2.76 mmol) of 5(S)-[1(S)-(Boc-amino)-2-phenylethyl]-3(R)-[(4-biphenylyl)methyl]dihydrofuran-2-(3H)-one are hydrolysed, in 28 ml of dimethoxyethane, with 11 ml of a 1M solution of lithium hydroxide in water. After 16 h at RT, the dimethoxyethane is evaporated off on a RE and the residue is treated with an ice-cold mixture of 15 ml of sat. NH4Cl solution, 80 ml of 10% citric acid solution and methylene chloride. The aqueous phase is separated off and extracted 2× with methylene chloride. The organic phases are washed with saline, dried with Na2SO4 and evaporated to give the title compound: TLC Rf (B)=0.4; tRet (II)=16.4 min.

Provenance & Evidence